JP4458996B2 - Absorbent articles - Google Patents

Description

  TECHNICAL FIELD The present invention relates to an absorbent article and a method for producing the absorbent article, and in particular, a liquid-permeable surface sheet material, a liquid-impermeable leak-proof sheet material, and a liquid retention property interposed between these sheet materials. The present invention relates to an absorbent article formed into a pants shape by joining both side edges of the back side part and both side edges of the abdominal side part, and a method for manufacturing the absorbent article.

  Absorbent articles such as disposable diapers and pants-type diapers, for example, are substantially longitudinal absorptions comprising a liquid-permeable surface sheet material, a liquid-impermeable leak-proof sheet material, and a liquid-retaining absorbent body. And the outer layer material including the back side, the abdominal side, and the crotch part. The absorbent body can effectively absorb the exhaust from the body, and the absorbed exhaust Various devices have been devised so that they can be firmly held without leakage.

  In addition, disposable diapers, pants-type diapers, etc. are folded in half at the crotch part with the outer layer material inside, for example, with the absorbent main body inside so as to be in the shape along the lower abdomen of the wearer such as a child or the elderly, A pants shape is formed by joining both side edges of the dorsal side and both side edges of the ventral side. Furthermore, by arranging an elastic member around the waist, an elastic member around the waist, an elastic member around the leg, and the like on the outer layer material, the texture and fit at the time of wearing are improved.

  In order to form disposable diapers and pants-type diapers in the shape of pants, as a means of joining both side edges of the back side and both sides of the belly side, a method of heat-sealing these side edges is generally used. As a joining means that makes it easy to peel and fold the joints on both side edges at the time of disposal, etc., or to rejoin the joints once peeled off as necessary, for example, The thing using the mechanical fastener which consists of a male material and a female material is known. In the case of a joining means using a mechanical fastener, as shown in FIG. 8, a male material 71 and a female material 72 are arranged on the inner surfaces of a pair of opposing side edge portions 70a and 70b, respectively, and these are simply overlapped and joined. Since the pulling force at the time of wearing is loaded as the pulling force in the T-direction, the bonding strength is insufficient. On the other hand, as shown in FIG. 9, the outer surface of one side edge portion 73a is overlapped with the inner surface of the other side edge portion 73b so that the male material 74 and the female material 75 are engaged with each other. Although it is conceivable that the force is applied as a tensile force in the shear direction, in the process of continuously manufacturing the absorbent article, the inner side of the other side edge 73b is formed on the outer surface of the one side edge 73a. It takes a lot of work to overlap the sides. In particular, in a manufacturing method using a so-called cross flow in which a web (continuous body) of an outer layer material to which an absorbent main body is intermittently attached is continuously sent out in the width direction of the manufactured absorbent article, the elastic member is in the circumferential direction of the trunk. Because it is necessary to handle the contracted part after the product is divided individually, the inner side surface of the other side edge part is connected to the outer side surface of the other side edge part. The degree of difficulty of the process of making the state of being overlaid increases.

On the other hand, even when a male material and a female material are respectively arranged on the inner side surfaces of a pair of side edges facing each other and bonded together, the tensile force at the time of wearing is loaded as the tensile force in the shearing direction. An absorbent article having a joint and a method for manufacturing the same have been developed (see, for example, Patent Document 1). According to Patent Document 1, as shown in FIG. 10, when manufacturing the absorbent article, the female material 76 of the mechanical fastener is folded into a flat C shape, and the folding line portion 76c is arranged on the outside so that one folded piece portion is formed. The outer surface of 76a is joined to the inner surface of one side edge 77a, and the outer surface of the other folded piece 76b is locked with the male member 78 provided on the inner surface of the other side edge 77b. It is a thing.
Special table 2003-533278 gazette

  However, according to the absorbent article described in Patent Document 1, the female member 76 can be folded in a double manner at the joint portion between the side edge 77b on the back side and the side edge 77a on the abdomen. Since the installation is twice as long as this, the material is wasted, and the manufacturing process of the absorbent article requires a double folding operation of the female member 76, which complicates the manufacturing process. It will become.

  Even when the male side and the female side are arranged and joined to the both side edges of the dorsal side part and the both side edge parts of the ventral side part with the inner side surfaces facing each other, the present invention can Absorbent article capable of easily forming a joint by a mechanical fastener in which a force is applied as a tensile force in the shear direction without using a large number of female materials and by a simple manufacturing process, and the absorbent article It aims at providing the manufacturing method of.

  The present invention comprises a liquid-permeable surface sheet material, a liquid-impermeable leak-proof sheet material, and a liquid-retaining absorbent body interposed between these sheet materials, and the back side portion and the stomach of the absorbent body By having an outer layer material extending on both sides of the side part and joining both side edges of the back side part and both side edges of the abdomen part via mechanical fasteners made of male material and female material, An absorbent article formed into a shape, wherein the male material base sheet is joined to the inner side surface of one of the side edges of the back side part or the abdomen side part of the back side of the outer side part. And the male part is disposed on the surface of the free part, and the male part is disposed on the back side. Engaging the female material provided on the inner surface of the other side edge of the part or the ventral side, By providing an absorbent article that joins the side edges of the side edge and the ventral, it is obtained by achieving the above object.

  Further, the present invention is a manufacturing method for manufacturing the absorbent article, wherein the web constituting the absorbent article is continuously fed out in a transverse flow, and the web fed out is parallel to the flow direction. Fold along the fold line and then separate into individual absorbent articles, prior to the step of folding the web and separating into individual absorbent articles, either the dorsal side or ventral side of the web The male material base sheet in which the male material is disposed is arranged on both sides of the planned separation line on one side and arranged on the inner surface of both side edge portions of each absorbent article to be separated. A step of attaching by joining the back surface of the side part, and when the web is folded in half, the male material is sandwiched between the planned separation lines at the other of the back side or the ventral side of the web. The web is individually separated by the planned separation line, and both the side edges of the back side and the side edges of the stomach side are joined via mechanical fasteners. The above object is achieved by providing a method for manufacturing an absorbent article for manufacturing the absorbent article.

  According to the absorbent article and the method of manufacturing the absorbent article of the present invention, the male material and the female material with the both side edges of the back side and the both side edges of the belly side facing each other. Even when materials are placed and joined, joints made with mechanical fasteners that allow the tensile force during wearing to be loaded as a tensile force in the shearing direction can be easily done without using many female materials and with a simple manufacturing process Can be formed.

  The absorbent article which concerns on preferable one Embodiment of this invention is manufactured as the underpants type diaper 10 as shown, for example in FIG.1 and FIG.2, and this underpants type diaper 10 is an elastic member to the base material sheet 11. FIG. 12a, 12b, 12c is an outer layer material 14 obtained by cutting a composite sheet member arranged in an expanded state, a liquid-permeable surface sheet material 15 attached to the inside of the outer layer material 14, and a liquid impervious material A leak-proof sheet material (not shown) and a vertically long absorbent main body 17 composed of a liquid-retaining absorbent body 16 interposed between these sheets. The underpants type diaper 10 of this embodiment folds the outer layer material 14 together with the absorbent main body 17 at the center of the crotch portion C so that the abdominal side A and the back side B are overlapped. At the same time, both side edge portions 18b of the back side portion B and both side edge portions 18a of the abdominal side portion A are connected to a mechanical fastener 13 made of a male material 19 and a female material 20 (see FIGS. 3 and 4 (a), (b)). By joining each via, it will be formed in a pants shape.

  And the underpants type diaper 10 as an absorbent article of this embodiment is a liquid-permeable surface sheet material 15, a liquid-impermeable leak-proof sheet material (not shown), and between these sheet materials. As shown in FIG. 3 and FIG. 4, it comprises an absorbent main body 17 having an intervening liquid-retaining absorbent body 16, and an outer layer material 14 including a back side portion B, an abdominal side portion A, and a crotch portion C. The both side edges 18b of the back side B and the side edges 18a of the abdominal side A by the outer layer material 14 extending on both sides of the absorbent body 16 are connected via the mechanical fastener 13 made of the male material 19 and the female material 20. It is an absorbent article formed into a pants shape by bonding each, and the band-shaped male material base sheet 25 is connected to the back side of the outer side portion 25a (the surface facing the outer layer material 14) of the back side portion B. By joining to the inner side surface (body side surface) of the side edge 18b, The inner part is attached as a free part 25b extending from the joined outer side part 25a, and the male material 19 is disposed on the surface of the free part 20b. Locking with the female material 20 provided on the inner side surface (body side surface) of the side edge 18a of the part A, the both side edges 18b of the back side B and the side edges 18a of the ventral side A are joined. is doing.

  Moreover, according to the underpants type diaper 10 of this embodiment, the base material sheet 11 or the inner layer nonwoven fabric 11a which is a constituent material of the outer layer material 14 is used as the female material 20 as it is.

  According to this embodiment, the underpants type diaper 10 is manufactured by the manufacturing process substantially the same as the conventional underpants type diaper with the process mentioned later. That is, for example, as shown in FIG. 5, a belt-shaped outer layer nonwoven fabric continuously supplied from a raw fabric roll is used as a base sheet 11, and for example, a hot melt adhesive is continuously applied to the base sheet 11. In addition to coating, a plurality of waist elastic members 12a, leg elastic members 12b, and waist elastic members 12c are provided in a state of being stretched to a predetermined elongation rate. Moreover, the base material sheet 11 is bonded by covering the base material sheet 11 on which the elastic members 12a, 12b, and 12c are disposed, for example, by joining the belt-shaped inner layer nonwoven fabric 11a continuously supplied from the raw fabric roll. A composite sheet member in which the elastic members 12 a, 12 b, 12 c and the inner layer nonwoven fabric 11 a are integrated is formed as a web 21 that is a continuous body of the outer layer material 14.

  Further, an absorbent main body 17 comprising a surface sheet material 15, a leak-proof sheet material, and an absorbent body 16 is formed on the web 21 of the outer layer material 14 that is continuously fed in the width direction of the formed pant diaper 10. Are attached intermittently, and a leg hole 22 is formed in the web 21 to be fed out by using, for example, a leg hole cutter device. After that, the web 21 of the outer layer material 14 is folded along a fold line parallel to the flow direction with the absorbent main body 17 inside, and the web 21 attached with the absorbent main body 17 is cut off and divided into individual products. By doing so, the underpants type diaper 10 is formed.

  And as shown in FIG.3 and FIG.4, the underpants type diaper 10 of this embodiment is the both-sides edge part 18b of the back side part B, and the ventral side part A via the mechanical fastener 13 which consists of the male material 19 and the female material 20. FIG. As the male material 19 of the mechanical fastener 13, for example, a large number of hooks, mushrooms, T-shaped, Y-shaped hooks are provided on one surface of the base material. Various known male fasteners of mechanical fasteners that stand up can be used. Further, according to the present embodiment, the male material 19 is formed in a belt shape having a width of about 3 to 40 mm, for example, and preferably a free part of the belt-shaped male material base sheet 25 having a width of about 5 to 50 mm made of a nonwoven fabric or the like. For example, heat bonding by heat sealing or ultrasonic waves or a bonding means such as hot melt is attached to 25b as a unit so as to express a considerable bonding strength. Furthermore, the back surface of the outer side portion 25a having a width of, for example, about 1 to 30 mm, preferably about 3 to 10 mm, of the male material base sheet 25 to which the male material 19 is attached, for example, a hot-melt adhesive or heat fusion. The male material 19 is attached over substantially the entire length of the side edge 18b by joining to the inner side surface of the side edge 18b of the back side B via a joining means such as a seal. It is preferable that the male material 19 is attached leaving a non-installation part at the upper and lower ends thereof. The non-installed portions of the upper and lower ends function as a pinch for triggering the removal of the pant-type diaper 10 from the wearer, and the front and back surfaces or the corners of the male material 19 having the protrusions are worn by the wearer. It is the part that is left behind to prevent direct contact with the skin. The dimension of the non-installation part is preferably 1 to 30 mm, particularly preferably 5 to 20 mm.

  Here, the male material 19 maintains an interval of 1 mm or more, particularly preferably 3 mm or more, between the side edge thereof and the free end of the free portion 25 b of the male material base sheet 25, and upper and lower end edges. The male material base sheet 25 is preferably affixed to the male material base sheet 25 with an interval of 1 mm or more, particularly preferably 3 mm or more, between the upper and lower edges. Thus, when the pants-type diaper 10 is worn, the entire male material 19 is surely covered with the male material base sheet 25 from the inside, and the male material 19 directly touches the wearer's skin and produces an uncomfortable feeling. Can be avoided. Moreover, it is preferable that the male material base sheet 25 is attached with the outer side edge 25 of the male material base sheet 25 close to the side edge of the side edge 18b of the back side B. Furthermore, the male material 19 is preferably attached to the side edge 18b of the back side B without being separated from the side edge by 40 mm or more. As a result, the locking of the male material 19 and the female material 20 approaches the side edge, and the material can be used effectively to form the inner dimensions around the waist of the diaper. Further, since the male material 19 is attached to both side edges 18b of the back side portion B, for example, when the pants-type diaper 10 is discarded after use, the back side is rounded inward while the abdominal side portion A is rolled inward. Without using a waste tape or the like separately by fixing the outer peripheral portion of the pants-type diaper 10 with the side edges 18b of the back side B rounded using the male material 19 in a state covered with the side B. The pants-type diaper 10 after use can be gathered in a compact manner, making it possible to reduce trash and make it difficult for the smell of excrement to leak, thereby improving the disposal of the pant-type diaper 10 become.

  In addition, according to this embodiment, it is preferable that the joining strength with respect to the inner surface of the side edge part 18b of the back side part B of the outer side part 25a of the male material base material sheet 25 is 3 N / 30mm or more. When the pants-type diaper 10 is worn, the joint portion between the outer side portion 25a of the male material base sheet 25 and the inner side surface of the side edge portion 18b is different from the joint portion of the mechanical fastener 13 by the male material 19 and the female material 20. In this case, a tensile force in the T-shaped direction is applied. By making the joint strength of the joint part 3N / 30 mm or more, the tensile force in the T-shaped direction is effectively resisted. Is possible. In terms of function, the male base material sheet 25 expresses a necessary joint strength with the outer layer material 14 when shipped as a product, and maintains the joint strength until just before using the product. It is preferable to use a material having a material strength that does not break itself against a load during wearing. In this sense, it is preferable to use a material that can ensure strength at the time of heat-sealing and has excellent heat-sealing properties in order to increase productivity. In order to improve the environment in the pants-type diaper 10, it is preferable to use a material having air permeability. A stretchable nonwoven fabric can also be used. By using a stretchable non-woven fabric as the male material base sheet 25, the male material base sheet 25 can be made stretchable, further improving the fit of the pant diaper to the wearer. It becomes possible.

  As for the female material 20 of the mechanical fastener 13, in terms of function, when shipped as a product, it is locked with a male material to express the necessary strength, and it is possible to maintain the strength until just before using the product. Any material can be used. Therefore, the material will change depending on the choice of male material. Whether or not to design with re-locking in mind is also an important criterion in selecting a female material. Examples of the female material 20 include various kinds of known mechanical fasteners such as a knitted fabric in which a large number of fibers are knitted in a loop shape or an arch shape on a base sheet, and a nonwoven fabric having a predetermined basis weight and fiber consistency. A female material can be used. According to the present embodiment, the female material 20 is designed so as to express a desired locking strength using the base material sheet 11 of the outer layer material 14 and the inner layer nonwoven fabric 11a as they are. Reduction and simplification of the manufacturing process for attaching the female member 20 can be facilitated.

  As another embodiment of the present invention, for example, as shown in FIG. 6, the constituent material of the outer layer material 14 is not used as the female material 20 as it is, and the knitted material is formed on the inner side surface of the side edge portion 18a of the ventral side portion A. A female member 20a made of, for example, a non-woven fabric is additionally attached, and the male member 19 attached to the free portion 25b of the male material base sheet 25 is locked to the female member 20a as the female material. The side edges 18b of the side portion B and the side edges 18a of the ventral side portion A may be joined. In such a case, the female member 20a can be made of a material characteristic, and can be re-engaged easily or can be designed with increased engagement strength.

  Further, according to the present embodiment, the waist elastic member 12a, the leg elastic member 12b, and the waist elastic are provided on the side edge 18b of the back side B of the pant-type diaper 10 and the side edge 18a of the abdominal side A. At the part where the member 12c is disposed and the male member 19 and the female member 20 are provided, at least a part of the elastic members 12a, 12b, and 12c does not substantially exhibit a contraction function due to elasticity. . Examples of the method that does not exhibit the contraction function include division of the elastic members 12a, 12b, and 12c, non-functionalization by heat sealing, and the like.

  Here, as a means for preventing the contraction function from appearing in the waist elastic member 12a, the leg elastic member 12b, and the waist elastic member 12c, for example, a method of manufacturing a composite elastic member described in JP-A-2002-253605 It is possible to employ one having substantially the same configuration as the elastic member dividing portion used in the above. That is, the elastic member dividing portion is composed of a cut roll having a pressing portion having a large number of convex portions for cutting the elastic member on the peripheral surface, and an anvil roll having a smooth surface disposed facing the cut roll. The web 21 of the outer layer material 14 in which the elastic members 12a, 12b, and 12c are disposed in the stretched state on the base sheet 11 is passed between the rolls, and the male material 19 and the female material 20 are provided at the disposition location. By applying a pressing force from the pressurizing unit, the elastic members 12a, 12b, and 12c are arranged through the numerous convex portions provided in the pressurizing unit while substantially preventing damage to the web 21. Each is divided into a plurality of pieces so as not to be continuous at the installation location. (Hereinafter, this means is referred to as “pre-cut”.) Further, a pre-cut means using a pre-cut cutter having a large number of convex portions as cutter blades may be employed.

  In addition, the waist elastic member 12a, the leg elastic member 12b, and the waist elastic member 12c are pre-cut so that the contraction function is not exhibited at the place where the male material 19 and the female material 20 are provided. In the manufacturing process, when the web 21 is cut along the planned cut line 23 (see FIG. 7) and divided into individual products, the arrangement positions of the male material 19 and the female material 20 are tension-free. As a result, it is possible to effectively avoid the opening and contracting / curling, and impairing the appearance and ease of use.

  Further, elastic members 12a, 12b, 12c made of, for example, hot melt adhesive are provided at portions adjacent to the non-functionalized portions around the waist elastic member 12a, leg elastic member 12b, and waist elastic member 12c. It is preferable to additionally provide a fixing means for preventing the slippage. In that case, the method of directly applying to the elastic members 12a, 12b, and 12c is effective in improving the adhesive strength.

  And the inner side surfaces of the both side edge portions 18b of the back side portion B and the both side edge portions 18a of the abdominal side portion A are arranged to face each other, and these are joined to each other via the mechanical fastener 13 composed of the male material 19 and the female material 20. According to the pants-type diaper 10 of the present embodiment, the tensile force at the time of wearing can be applied as the tensile force in the shearing direction without using many female members 20 at the joint. Thus, a sufficient bonding strength can be obtained easily and efficiently. That is, according to this embodiment, as shown in FIGS. 3 and 4, the belt-shaped male material base sheet 25 joins the back surface of the outer side portion 25 a to the inner side surface of the side edge portion 18 b of the back side portion B. By doing so, it is attached in a state where the inner part extends as the free part 25b from the outer side part 25a, and the male material 19 is disposed on the surface of the free part 15b. Since the female material 20 provided on the inner side surface of the side edge portion 18a of the ventral side A is locked, when the pants-type diaper 10 is mounted, the male material base sheet 25 to which the male material 19 is attached, This free part 25b can be opened to the side of the abdomen A, and can be extended in the circumferential direction along the waist of the wearer, thereby being twice as long as folded into a C shape. Efficiently and effectively without using a female material Definitive pulling force makes it possible to be loaded as a pulling force shearing direction.

  Moreover, as shown in FIG.5 and FIG.7, the underpants type diaper 10 of the present embodiment having the above-described configuration can be easily formed by a simple manufacturing method. That is, according to the present embodiment, as described above, the liquid-permeable surface sheet material 15 (see FIG. 2), the liquid-impermeable leak-proof sheet material, and these, as in the conventional manufacturing process, A step of continuously feeding out the web 21 of the outer layer material 14 to which the absorbent main body 17 having the liquid retaining absorbent body 16 (see FIG. 2) interposed between the sheet materials is intermittently attached; The web 21 to be fed out is folded along a fold line parallel to the flow direction with the absorbent main body 17 inside, and then the web 21 is separated as individual pant-type diapers 10.

  On the other hand, according to the manufacturing method of the present embodiment, prior to the step of folding the web 21 and separating it into individual pant-type diapers 10, the web 21 is separated on both sides of the planned separation line 23 on the back side B of the web 21. The male base material sheet 25 in which the male material 19 is disposed is arranged on the inner side surface of both side edge portions 18b of the back side portion B of each pant-type diaper 10 to be formed, and the back surface of the outer side portion 20a thereof. For example, by attaching them via a point seal. In addition, although the male material 19 and the male material base material sheet 25 can be supplied to the back side portion B of the web 21 in separate steps, the supply after being integrated is the male material 19 and the male material base material. The processing accuracy of the sheet 25 can be increased, and this is an extremely effective method.

  And when the web 21 is folded in half, the male material 19 is provided on both sides of the separation line 23 in the ventral side A of the web 21 with the base material sheet 11 and the inner layer nonwoven fabric 11a (FIG. 5). And the webs 21 are individually cut off at the planned cut-off line 23, so that the side edges 18 b of the back side B and the side edges 18 a of the belly side A are interposed via the mechanical fastener 13. The pants-type diaper 10 as the absorbent article according to the present embodiment, which is joined to each other, can be obtained by a simple process that is substantially the same as the conventional cross-flow manufacturing process without requiring a complicated process of folding a female material twice. It will be easy to form. In addition, when the web 21 is folded in half, the male material 19 and the female material 20 or the portion corresponding to the female material 20 are locked. It is preferable to provide an appropriate pressing means. In an additional pressurizing means, when pressurizing between a pair of rolls, pressurize only in the locking region, provide a slight speed difference to each of the pair of rolls, and apply pressure in the shear direction. It is also possible to improve the locking force.

  In addition, according to the manufacturing method of the present embodiment, the male material base sheet 25 in which the individual male materials 19 are pasted on both sides of the planned separation line 23 in the back side portion B of the web 21 is separated. It is attached as a continuous member across the planned line 23, and when the web 21 is cut along the planned cut line 23, the male material base sheet is formed on both side edges 18b of the back side B of each pant-type diaper 10. Preferably, each of the 25 is attached. By attaching the male material 19 to the male material base sheet 25 in two pieces, it is possible to eliminate the male material adjacent to the side edges 18b of the back side B (often this male material gives the wearer a sense of incongruity), and the unit price Costs can be reduced by reducing the amount of high male material used. Further, by attaching the male material base sheet 25 as a continuous member, it is easy to handle the male material base sheet 25 that needs to form a free end, and the male material is provided on both sides of each separation line 23. It is possible to simplify the work of attaching each 19. At this time, the joint portion between the male material base sheet 25 and the outer layer material 14 may be disposed so as to overlap the planned separation line 23, but preferably it is joined on both sides of the planned separation line 23. preferable. By doing so, the hardness of the junction part of the separation line 23 can be suppressed, and it can be set as a wearer-friendly design.

  Furthermore, according to the manufacturing method of this embodiment, including the process of temporarily attaching | bonding the free part 25b of the male material base material sheet 25 attached to the both sides which pinched | interposed each separation planned line 23 in the back side part B of the web 21 is included. Can do. Temporary attachment means that the free part to which the male material 19 of the male material base sheet 25 is attached should not be bonded to the web 21 originally, but it does not cause a problem by being opened during processing. Therefore, the free portion 25b of the male material base sheet 25 is adhered to the web 21 to such an extent that it can be easily peeled off during use. As means for performing temporary attachment, known means such as a hot-melt adhesive, a heat-sealing seal, and pressure bonding can be employed. It is preferable to temporarily attach to the web 21 to the extent that no material breakage occurs. This makes it possible to effectively avoid turning over the free portion 25b of the male material base sheet 25 during the production of the pant-type diaper 10.

  In addition, without using the constituent material of the outer layer material 14 as the female material 20 as it is, when the female member 20a made of knitted fabric or nonwoven fabric is additionally attached to form the female material, A process of attaching the female members 20a to both sides of the planned separation line 23 may be included.

  Moreover, after attaching the male material base material sheet 25 in advance on both sides of each separation planned line 23 in the back side portion B of the web 21, including a step of attaching the male material 19 to each of them later. You can also.

  Further, after folding the absorbent main body 17 inside along the folding line, an additional pressurizing step is provided before the step of separating the web 21 as individual pant-type diapers 10, The engagement of the mechanical fastener 13 with the female material 20 can be made stronger.

  Furthermore, according to the manufacturing method of the present embodiment, the male material 19 and the female material 20 are, as described above, prior to the process of attaching the male material 19 to both sides of the web 21 with the planned separation lines 23 interposed therebetween. It is preferable to include a step of pre-cutting the elastic members 12a, 12b, and 12c at the provided locations so that the contraction function is not expressed. In particular, it is preferable that the outer layer material 14 that overlaps the female material 20 or the portion that coincides with the female material 20 does not exhibit a contraction function even when locking with the male material 19 is considered.

  The present invention is not limited to the above-described embodiment, and various modifications can be made. For example, the present invention is not limited to a pants-type diaper, but can be applied to various absorbent articles having other pant shapes. In the embodiment described above, the pant-type diaper composed of the absorbent main body and the outer layer material has been described in detail. However, the present invention can also be applied to a pant-type diaper that does not include the absorbent main body. In addition, the absorbent article of the present invention is not limited to the one manufactured by the manufacturing method of the above embodiment, but can be manufactured by other manufacturing methods. It may be manufactured by a manufacturing method. Further, a male material base sheet to which a male material is attached may be attached to the side edge portion of the abdominal side portion, and a female material may be provided on the side edge portion of the back side portion to constitute a joint portion by a mechanical fastener. Furthermore, when removing the pants-type diaper after use from the wearer, if the force in the peeling direction is applied to the mechanical fastener, the locked side portion can be easily peeled off. As described above, it is preferable to apply a small portion and use the upper portion as a knob. In a different form, for example, as shown in FIG. 11, the side edge 18a of the ventral side A is provided with a knob 24 cut out in a concave shape so that the side edge 18b of the back side B can be easily picked. Thereby, the ease of peeling of the junction part by a mechanical fastener can be improved. Further, even if rejoining is performed, rejoining can be facilitated.

It is a front view showing a pants type diaper which is an absorptive article concerning one embodiment of the present invention. It is a front view which shows the state before joining the both-sides edge part of the underpants type diaper which is an absorptive article concerning one embodiment of the present invention. It is a schematic perspective view explaining the principal part of the underpants type diaper which is an absorptive article concerning one embodiment of the present invention. It is sectional drawing explaining the principal part of the underpants type diaper which is an absorptive article concerning one embodiment of the present invention. It is a schematic perspective view explaining the manufacturing process of the underpants type diaper which is an absorptive article concerning one embodiment of the present invention. It is sectional drawing which shows the principal part of the underpants type diaper which is an absorptive article concerning other embodiments of the present invention. It is a top view explaining the principal part of the manufacturing process of the underpants type diaper which is an absorptive article concerning one embodiment of the present invention. It is explanatory drawing of the junction part by the conventional mechanical fastener. It is explanatory drawing of the junction part by the conventional mechanical fastener. It is explanatory drawing of the junction part by the conventional mechanical fastener. It is a schematic perspective view explaining the principal part of the other form of the underpants type diaper which is an absorptive article concerning one embodiment of the present invention.

Explanation of symbols

10 Pants-type diapers (absorbent articles)
11 base material sheet 12a waist elastic member 12b leg elastic member 12c waist elastic member 13 mechanical fastener 14 outer layer material 15 surface sheet material 16 absorbent body 17 absorptive main body 18a abdominal side edge 18b Side edge 19 Male material 20 Female material 20a Female member (female material)
21 Web (continuous outer layer material)
22 Leg hole 23 Scheduled separation line 24 Knob 25 Male material base sheet 25a Male material base sheet outer side 25b Male material base sheet free part A Abdominal side B Back side C Crotch

Claims (7)

A liquid-permeable surface sheet material, a liquid-impermeable leak-proof sheet material, and a liquid-retaining absorbent member interposed between these sheet materials, both sides of the back side and the ventral side of the absorbent body It is formed into a pants shape by joining the both side edges of the back side and the side edges of the abdomen via mechanical fasteners made of male and female materials. An absorbent article,
The male material base sheet is inward of the outer side part joined by joining the back surface of the outer side part to the inner side surface of either the back side part or the abdominal side part. It is attached with the part extended as a free part, and the male material is disposed on the surface of the free part,
The male material is engaged with the female material provided on the inner surface of the other side edge of the back side or the abdomen, and both side edges of the back side and both sides of the abdomen It has joined the door,
The absorbent article includes a waist elastic member and a waist elastic member, and the waist elastic member and the waist elastic member do not exhibit a contraction function at a location where the male material and / or the female material is provided. and that the absorbent article.   The absorbent article according to claim 1, wherein the male material base sheet on which the male material is disposed is attached to a side edge portion of the back side portion, and the female material is provided on a side edge portion of the abdominal side portion.   The absorbent article according to claim 1 or 2, wherein the female material uses the constituent material of the outer layer material as it is. It is a manufacturing method for manufacturing the absorbent article according to claim 1, wherein the web constituting the absorbent article is continuously fed out in a lateral flow, and the web fed out is folded in parallel with the flow direction. Folds along and cuts into individual absorbent articles,
Prior to the step of folding the web and separating it into individual absorbent articles, each absorbent article formed separately on both sides of the web on either the back side or the abdomen side of the web. It is disposed on the inner side surface of both side edges of the male material base sheet provided with the male material, the step of attaching by joining the back side of the outer side of this,
Prior to the step of attaching the male material base sheet in which the male material is arranged on both sides of the web separation planned line, the elastic member at the location where the male material and the female material are provided is cut and contracted in advance. Including preventing the function from being expressed,
When the web is folded in half, the male material is locked to the female material provided on both sides of the web on the other side of the back side or the abdomen side of the web, and the cut is separated. A method of manufacturing an absorbent article, in which the webs are individually cut along a predetermined line, and an absorbent article is manufactured in which both side edges of the back side part and both side edges of the belly side part are joined via mechanical fasteners. . The male material base sheet is attached as a continuous member on both sides of the planned separation line, and before or simultaneously with the web being cut along the planned separation line, the back of each absorbent article. The manufacturing method of the absorbent article of Claim 4 attached to the both-sides edge part of a side part or a stomach side part, respectively. The manufacturing method of the absorbent article of Claim 4 or 5 including the process of temporarily attaching | attaching the free part of the said male material base material sheet attached to the both sides on both sides of the said separation plan line. The manufacturing method of the absorbent article in any one of Claims 4-6 including the process of attaching the said female material to the both sides which pinched | interposed the said separation planned line in the other of the back side part or the belly side part of the said web.